Cutter-head for stone-dressing machines



(No Model.) 3 Sheets-Sheet l.

J. MARR & D. J. SPELLMAN. CUTTER HEAD FOR STONE DRESSING MACHINES.

Patented Aug. 16, 1887.

(No Model.) 3 Sheets-Sheet 2.

J. MARR & D. J. SPELLMAN.

CUTTER HEAD FOR STONE DRESSING MACHINES.

No. 368,218. Patented Aug. 16, 1887.

(No Model.) s SheetsSheet a.

J. MARR 8 D. J. SPELLMAN. CUTTER HEAD FOR STONE DRESSING MACHINES.

No. 368,218. Patented Aug. 16, 1887;

j zg a5? NY PETERS. PhnXu-Ulmgnphe Fries.

JOSEPH MARE AND DANIEL J. SPELLll'IAN, OF STOCKTON, CALIFORNIA.

CUTTER-HEAD FOR STONE-DRESSING MACHINES.

SPECIFICATION forming part of Letters Patent No. 368,218, dated August 16, 1887.

Application filed October 7, 1886. Serial No. 215,603. (No model.)

To all whom it may concern:

Be it known that we, J osnrn Mann and DANIEL J. SPELLMAN, citizens of the United States, residing at Stockton, in the county of San Joaquin and State of California, have invented certain new and useful Improvements in OutterHeads forStone -Dressin g Machines; and we do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

Our invention consists in a certain construction of a cutter-head having cutters attached to it for dressing stone, such cutter-head bcin g driven by necessary shafts, pulleys, and belts attached to a suitable frame.

To more fully explain our invention, reference is had to the accompanying drawings, forming a part of the specification, in which- Figure 1 is a side elevation, Fig. 2 is an end elevation, and Fig. 3 is a front elevation, of the cutter head. Fig. t is a side elevation of the same. Fig. 5 is an end view of a cutter.

Similar letters of reference indicate corresponding parts.

A A are the longitudinal sills of the frame- Work.

B B are the cross-beams.

C O are vertical standards.

F F are reclining posts, the feet of which are attached to sills A, and the tops of which are connected to the tops of standards 0 by beams D. The beams D are connected together and given requisite stiffness by a crossbrace, E.

All the above-described timbers are secured together by bolts at the respective points of connection.

Guides G are iron plates having cog-racks on one side, and are attached to the faces of posts F, there being slots in the guides and in. the posts parallel with each other.

G is an iron frame attached to the faces of the guides G so that the former may be vertically adjustable in the slots above described. A shaft, G, has its journal-bearings in boxes on the frame G, and has pinions g engaging with the cogracks of the guides G and is controlled by a band-wheel, G, on its end.

By this means the frame G is raised and lowered. Below the shaft G'is a shaft, H, also having its journal-bearings in boxes on frame G, having attached at one end thereof a circu lar cutter-head constructed as follows,I being the rim, b the spokes, and (Z the hub: A flange, a, is bolted or otherwise secured to the spokes. A shaft, 0, is secured to the flange c and rim I. Upon this shaft are placed any desired number of circular cutters, f, with radiating eutting-edges on their faces. The pressure of the cutters upon the stone is controlled by the use of a setscrew or other desired method.

Motive power to the shaft H is furnished by a pulley, J, thereon, connected by a belt, K, to apulley, L, on a shaft at the rear of the frame of the machine, such shaft having a pulley, M, thereon, which is driven by a belt, N, connected with the motor. The block 0 of stone being placed in position, the cutter-head, by means of the vertically-adjusting mechan ism heretofore described, is placed at the desired point of contact, and the pressure of the cutters f is regulated by the horizontal feedscrew or other adjustment. Power is then applied through the various pulleys and belts, as described, and the process of dressing the surface of the stone 0 is performed much more expeditiously, thoroughly, and cheaply than by the usual manual process.

In between. the cutters are placed washers, which serve to separate the ends of the cutters, and thus allow them to revolve wit-h as little friction as possible upon each other. A series of short cutters are used, as here shown, so as to enable those near the cutters, and which have the shortest distance to travel, to move more slowly or drag over the surface, while those cutters nearer the outer edge, and which have the longest distance to move, can move rapidly without being retarded by those which have to travel slowly.

In the use of our invention upon a soft quality of stone it is preferred to use a vertical shaft, instead of the horizontal shaft H, as described. Our method of using such vertical shaft will be made the subject-matter of another application.

W'e are aware that separate cutters, all of the same size, have been arranged upon the same pivot both in a hand-working tool and in a machine where the cutters have been arranged 7 separate cutters have been arranged 011 pivots horizontally around a large cylinder, and that and flange connected thereto, the radial pivotal rods, which are passed through both flange and rim, and the separate cutters of equal size, which are placed upon the rods, substantially as shown.

2. The combination of the frame-work providedwith the adj usting-racks,the frame-work G, which is made adjustable upon the frame work A, the shaft G, provided with pinions for engaging with the racks, the shaft H, can

rying the cutter-head, and which has an endwise movement, and the screw for adjusting the shaft endwise and thus regulating the pressure of the cutters upon the stone, substantially as set forth.

In testimony whereof we affix our signatures in presence of two witnesses.

JOSEPH MARE. DANIEL J. SPELLMAN.

Witnesses:

J OSHUA B. W'E'BsTER, ELII-IU B. STOWE. 

